Academic Journal
The non-convex shape of (234) Barbara, the first Barbarian
| العنوان: | The non-convex shape of (234) Barbara, the first Barbarian |
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| المؤلفون: | Tanga, Paolo, Carry, B., Colas, F., Delbo, M., Hanuš, Josef, Ali Lagoa, V., Andrei, A.H., Assafin, M., Audejean, M., Behrend, R., Camargo, J.I.B., Carbognani, A., Cedres Reyes, M., Conjat, M., Cornero, N., Coward, D., Crippa, R., de Ferra Fantin, E., Devogele, Maxime, Dubos, G., Frappa, E., Gillon, Michaël, Hamanowa, H., Jehin, Emmanuel, Klotz, A., Kryszczynska, A., Lecacheux, J., Leroy, A., Manfroid, Jean, Maquet, L., Morelle, E., Mottola, S., Polinska, M., Roy, R., Todd, M., Vachier, F., Vera Hernandez, C., Wiggins, P. |
| المصدر: | Monthly Notices of the Royal Astronomical Society (2015-02-02) |
| بيانات النشر: | Blackwell Publishing, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Asteroid, Shape, Occultations, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique |
| الوصف: | Asteroid (234) Barbara is the prototype of a category of asteroids that has been shownto be extremely rich in refractory inclusions, the oldest material ever found in the SolarSystem. It exhibits several peculiar features, most notably its polarimetric behavior.In recent years other objects sharing the same property (collectively known as ”Barbarians”)have been discovered. Interferometric observations in the mid-infrared withthe ESO VLTI suggested that (234) Barbara might have a bi-lobated shape or evena large companion satellite. We use a large set of 57 optical lightcurves acquired between1979 and 2014, together with the timings of two stellar occultations in 2009, todetermine the rotation period, spin-vector coordinates, and 3-D shape of (234) Barbara,using two different shape reconstruction algorithms. By using the lightcurvescombined to the results obtained from stellar occultations, we are able to show thatthe shape of (234) Barbara exhibits large concave areas. Possible links of the shape tothe polarimetric properties and the object evolution are discussed. We also show thatVLTI data can be modeled without the presence of a satellite |
| نوع الوثيقة: | journal article http://purl.org/coar/resource_type/c_6501 article peer reviewed |
| اللغة: | English |
| Relation: | urn:issn:0035-8711; urn:issn:1365-2966 |
| DOI: | 10.1093/mnras/stv229 |
| URL الوصول: | https://orbi.uliege.be/handle/2268/179031 |
| Rights: | open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsorb.179031 |
| قاعدة البيانات: | ORBi |
| DOI: | 10.1093/mnras/stv229 |
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